Waterproof material and the manufacture thereof



Patented Sept. 26, 1933 UNITED STATES PATENT OFFICE WATERPROOF MATERIAL AND THE MANU- FACTURE THEREOF Ludwig Kern,

Webster Groves, M0.

N Drawing. Application June 18, 1930 Serial No. 462,131

2 Claims.

proofing and weatherproofing which involves a 5 treatment of materials with vapors.

Among the several objects of the invention treating materials and the like. Other objects will be in part obvious and in part pointed out hereinafter.

The invention ments and combinations of elements, steps and thoroughly waterproofed, acidproof, fume-proof, and in addition, antiseptic.

In carrying out the present contact with the material to be treated. A great proportion of the temperature.

A wide variety of materials can be impregnated and waterproofed by this I claim. 1. The process of waterproofing materials which comprises impregnating said materials w1th a products including hydrocarbons, phenols, tars,

products. LUDWIGKERN. 

